After spending a few hours in Boca da Valeria, you will understand why locals hope for any breeze through an open window to cool them off. The temperature is hot all year. The lows are in the mid-70s°F. The highs are in the upper-80s. From September through December, it is common to reach the mid to upper 90s compounded by high relative humidity. In short, the heat index measures sweltering!